Fedora Installation :: Disks Mirroring Setup For Failover
Nov 10, 2009
Have been tasked with a couple of Sunfire X2100 that I am slapping Fedora 11 onto for some high profile tasks around the office. Have two drives of the same size in each server and would like to have the two disks mirrored for redundancy. Admittedly I am new at Linux administration and am feeling over my head.
1. Can this be managed during the installation process of Fedora 11?
2. If yes, let me know the step by step please.
3. If no, I take it a cron job of rsync is going to be my best option.
4. Alternatives insights etc.
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Feb 18, 2010
I'm using Ubuntu 9.10 and previously had a separate partition with another distro on it. I decided to delete the other distro's home and swap partitions and install XP in place of it. I've been following these instructions: [URL] and [URL] I have gotten to the point where I am booting to the XP CD and want to install it, but I get the message, "Setup did not find any hard disks installed on your computer" when I should be getting to the screen that asks me to select a partition to install XP on. This is what my HDD looks like in GParted:
I want to install XP in the unallocated partition, but I have a feeling I screwed up somewhere along the way and probably don't fully understand the whole thing. Even if I try to format the unallocated partition to NTFS I can't make it a primary partition (I assume because it's within sda2). The very last thing I want to do is delete my Ubuntu partition and start from scratch, but if that's my last option let me know.
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Feb 14, 2010
What is the current state of NFS failover (i.e. setting up two server with shared storage, with automatic failover if one fails?) I've seen a cookbook, but no details that would let me assess how well it works. There are lots of complex issues with data consistency, but the detailed information on that is years old. Our needs are fairly simple: 2 servers, a shared array, and I'm reasonably sure that we don't use locking. However we'd like failover to work reliably without loss of data.
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Jul 21, 2010
I planned to setup raid 1 mirroring for my small home environment. Then I selected two new harddisk and connected to my system. I inserted my fedora dvd and I clicked raid button in the graphical installation process by refering redhat docs. I installed successfully in /dev/sda /dev/sdb it works fine. For testing purpose I removed one harddisk /dev/sda. My system didnt boot it shows grub error. Why this happened? Since I have configured raid mirroring why the system is not booting from second harddisk /dev/sdb.
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Jun 4, 2010
I've been all afternoon trying to install Ubuntu Lucid on my fakeRAID 0 configured (2) HDDs and am unable to set GRUB up. The fake RAID setup is provided by Intel Matrix Storage Manager, it is correctly enabled and the BIOS is also correctly set up -- in fact, I've managed to install Windows 7 with no significant hitch. After struggling with partioning the drives (had to follow advice I found on a very helpful guide online [0]), creating the filesystems AND getting Ubuntu's installer to actually do what it is supposed to do, I now cannot seem to set GRUB up. My system, as it stands, is unbootable at all; via live CD only.
This is how the RAID0 dev is partitioned:
Code:
# fdisk -l /dev/mapper/isw_ecdeiihbfi_Volume0
Disk /dev/mapper/isw_ecdeiihbfi_Volume0: 1000.2 GB, 1000210694144 bytes
255 heads, 63 sectors/track, 121602 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 131072 bytes / 262144 bytes
Disk identifier: 0x6634b2b5 .....
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Aug 13, 2009
I am trying to setup multipath with failover policy on openSuSE 11. I have two qla2xxx HBA's installed and they appear to be working. Here is the output of "multipath -l" command
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While testing, I pulled one of the two connection to SAN, and the connection failed over to second HBA connection to SAN. When I plug the cable back in, it does not fall back to original connection... It stays in failed state. Also, I noticed that failed disk (sdd disk) comes back as (sdg disk), which is probably why connection does not fall back to original HBA. But, when I run "/sbin/service multipathd restart" sdg disk shows as as enabled in multipath -l...
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Mar 1, 2011
I am familiar with windows 2008 cluster servers, and I just started testing with centos cluster. I am creating a simple 2-node cluster, for a simple ping test.
Node 1: 10.0.0.1
Node 2: 10.0.0.1
Virtual ip: 10.0.0.10
So far, I can ping a virtual ip, and manually relocate it between the nodes, but I didn't figure out, how to do this automatically. So this is my question: How can I setup the cluster, to it automatically failover the a service to another node case one node fails?
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Mar 31, 2010
I have/had a PC with several hard drives, and a mix of ubuntu and windows on multi boot.The old boot drive died screaming, and I need to start again. (But my data is safe! yay!)
Is there anything special about which drive can be the main drive to start booting from? Or to put it another way, can I install to any of the other 3 and expect it to work, or do I need to switch them around so a different drive is on the connections for the recently dead one?
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May 4, 2010
i have set up apt-cacher-ng and it is working fine.I have configured the clients using the synaptic gui, (configuration-preferences-network-set proxy...)Is there a way to configure the clients so that they use the proxy when it is available (at the office) and they fall back to using no proxy when the proxy cannot be reached?We have a lot of laptops at the office which are on the road a lot, in the office i want them to use apt-cacher-ng for updates and installation, when the users are not in the office they should be able to install software without having to change the synaptic conf...
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Jun 8, 2010
We are having a production setup where we are having one SAN storage and two RHEL machines. Now we have created a SAN LUN, say for example trylun. Now we have mounted the same SAN partition on both the machines of RHEL on the same mountpoint path say for example /trylun. After that we have installed RHEL Cluster suite to create a failover cluster.
Now we will be having one Ingres Database service for which data will be stored in SAN storage LUN mounted on both the machine say for example /trylun. When service on one machine will be down then RHEL Cluster Suite failover cluster will takeover and then it will start the same service on another node and handle the failover. Wether Ingres will run from node 1 or node 2 will not make any difference as both are using shared SAN storage i.e /trylun in our example. So same data storage will be used by both the ingres service on both the servers.
Now I have to simulate the same in my office test environment. But the problem is, in office test environment I will not have SAN server as it is additional cost. And I will have fedora operating system.
So I wanted to know is how can we create a shared file system like SAN in fedora (Is NFS a solution). And after creating the shared file system how can we create a failover cluster in fedora if we do not have Red Hat Cluster Suite.
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Jul 7, 2011
I`d like to know what happens when with the disks the we include in the installation process of Fedora 15.Obviously, the HD we choose to be the system is entirely formated and reconfigured. But what about the others?hat does happen to them? I`m asking this because I have included two brand new disks of 2 TB, one of them with 900.000 files and the other empty, both of them formated with ext4, and completely functional on Fedora 14.However, after the upgrade, in the very first Fedora 15 boot, these disks disapeared from "places", and could not be mounted even via terminal. Opening the Gnome Disk Utility, I found out they had been changed to VLM (instead of ext4) and that they also lost their original lable. I am starting to be concerned because all the data there was important to me.
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Nov 4, 2009
I have 600GB striping disks with 3 ntfs partitions, 2 ext4 partitions and 1 swap partion containing ubundu 9.10 and 120 GB free space. When I try to create new ext4 partitions with the fedora dvd I get the message: Could not allocate requested partitions. Not enough free space on disks, no matter how small the partitions I try to create. I created logical partitions.
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Nov 18, 2009
Fedora 12 seems to have made all my ntfs disks and partitions into LVM Linux (whatever that is) In all the time i've used other distros I've never seen this before .... I m getting them back to original state and accessable again, but have no idea what to do.....
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I need help with:
1. get them back to original partition system
2. get them mountable
A question though, the information/files i had on these drives/partitions is it lost ? or is it still there?
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Feb 11, 2010
I have a mail server on Fedora 8. I would like to have a mirror to this server so that it takes over in case my server goes down.I dont know how to go about it.
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Jan 5, 2011
I am using Ubuntu 10.10. I have a system set up with 1tb HD. I also have another 1tb HD which I'd like to use to mirror the other drive. So if the primary HD fails I can boot and operate from the mirrored drive. I've read that this is possible by using Raid. however I am confused if it is possible to set-up with a HD which is already set-up Ubuntu system. Also what what I can make out the mother board does not have a raid option.
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May 2, 2011
I'm doing a fresh install of xubuntu 11.04 x86 32bit via the Alternative CD. My computer has two 2TB drives and I want to mirror the partitions for redundancy For the Linux partitions (ie root and swap) I'll be creating raid partitions on each drive and using software RAID 1 to create md partitions of type ext4 and swap.
For the GPT's bios boot partition, am I also meant to use software raid ? Ie create a raid partition on each drive and use software RAID 1 to create a md partition of type bios boot ? Or am I meant to not use raid partitions and just create a bios boot partition directly on each drive ? In this case, will xubuntu's install process and grub tools ensure that both partitions contain the relevant grub files or do I have to explicetly do somthing to ensure that ?
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Jan 11, 2010
I just bought two 320GB SATA drives and would like to install F11 with software RAID 1 on them. I read an article which explains how to install RAID 1, but it used 3 disks: one for OS and two clones. Do I really need a third disk to install RAID 1 configuration? If 2 disks is enough, then should I select "Clone a drive to create a RAID device" during F11 installation as explained here?
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Feb 25, 2011
I'm in the process of trying to install FC14 64 bit to my Window 7 64 bit system. This new system has a 6.0 Gb/s internal hard drive.When I reboot with the F14 install disk I have made it past the disk verification (is Verified) and then picking a language but then I get the message "No usable disks have been found". In Win 7, the Disk Management window shows that 184 GB of space are free. Is there some disk preparation that I should do to make this space available?
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Jul 7, 2011
I`d like to know what happens when with the disks the we include in the installation process of Fedora 15.Obviously, the HD we choose to be the system is entirely formated and reconfigured. But what about the others? What does happen to them? I`m asking this because I have included two brand new disks of 2 TB, one of them with 900.000 files and the other empty, both of them formated with ext4, and completely functional on Fedora 14. However, after the upgrade, in the very first Fedora 15 boot, these disks disapeared from "places", and could not be mounted even via terminal. Opening the Gnome Disk Utility, I found out they had been changed to VLM (instead of ext4) and that they also lost their original lable. I am starting to be concerned because all the data there was important to me.
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Mar 16, 2010
I have installed fedora-ds-1.0.4-1.FC6.x86_64.opt.rpm on RHEL 5 Enterprise, which I use for Oracle BIEE. Now I need to install the FDS in another RHEL 5 and mirror only the FDS.
configure the mirroring part for the Fedora Directory Server.
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Apr 23, 2009
I did a fresh install of Fedora 10 x86, then updated fully with yum, then did a preupgrade to F11 Beta. The download of the rpms works fine but the preupgrade reboot fails with:
Error downloading kickstart file
Unable to download the kickstart file.....
proceed as an interactive installation
hd:UUID=8f4a.....(uuidhere) ...05a8:/upgrade/ks.cfg
I have a SCSI disk so I'm suspicious preupgrade is having trouble accessing it? That prefix "hd" looks suspicious, should that be:
Code:
sda:UUID=8f4a.....(uuidhere) ...05a8:/upgrade/ks.cfg
or maybe
Code:
sd:UUID=8f4a.....(uuidhere) ...05a8:/upgrade/ks.cfg
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Apr 30, 2009
I have three hard disks in my PC , hda is used for /, /home, /boot and swap. Everything seems to setup fine here I then have partitions sdb1 and sdc1. On the edit partion options for these hard drives I can set the mount point. I have never seen this before with the other distros I have used and usually have to mess around with fstab after install to mount these disks, so was pleased to see this option.
Under my previous install (Debian, which I didn't use for long) I had these drives mounted under /media/store1 and /media/store2. This is reflected in the "Edit Parition: /dev/s***" options where the "Original File System Label" is shown as store1 and store2 for each disk
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Aug 14, 2009
I got a new computer (core i7, 6gb ram, 500gb hdd).I first installed Windows 7, because I remembered how Fedora 9 created a dual-boot screen nicely, while if I installed XP on a system with Fedora 9 it would just take over the boot and boot to XP.Anyway, so Windows 7 is installed, and I got the Fedora 11 DVD install.I partitioned the hdd as thus (on win7 installation): 93gb windows system, 300gb media partition, 90gb unformatted.When I boot the installation and select the "use free space" I get an error that there isn't enough free space on the disks to create the layout.I also tried to create a custom layout, but after a few errors I gave up on that what should I do to get Fedora 11 installed?
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Jan 19, 2010
I have installed Fedora 12 i686 Live to a 200 mb partition on an external drive. Before the install I created a 6.7 GB ext3 partition and a 45 GB ext3 partition. The live cd copied the image to a 200 mb partition.
partition 2bce0f9d-53a6-4ec2-b5ad-1a6915c74260 is 45 GB
partition 4683EB23BED2EB34 is 102.6 GB NTFS
partition b7240ff1-0807-42ba-e172-bff5872519ad is 6.7 GB
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Will creating an entry in fstab sdb6 and sdb8 allow the fedora distrib dvd to install to the external hd? How do I create the entries?
I have a raid0 hd with windows xp pro. When i try to shrink the partition using anaconda, I get a disk error and the comper locks up. I have to shut off the ups to reboot.
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Mar 17, 2010
How do I reconfigure grub when adding a disk to a machine where both disks have their own MBRs? I have two volumes:Disk 1 - actually mirrored RAID-1 drives managed by ICH9R on the motherboard Disk 2 - a single drive managed by ICH9R on the motherboard, but without RAID. Disk 1 is the "old" disk containing WinXP on the first partition. The MBR of Disk 1 was created by Windows. Disk 2 was built on the machine while Disk1 was unplugged. Disk2 has Win7 on /dev/sda1 and Fedora 12 on /dev/sda7. Obviously, Disk 2 has grub installed on its own MBR.
When I plug-in both Disk 1 and Disk 2 at the same time, I would like to reconfigure grub so that it gives me the option to switch between WinXP on Disk 1, Fedora on Disk 2 and Win7 on Disk 2. (I may also want to install Ubuntu on another partition of Disk 1, but that's a separate issue.) The problem is that when I plug in Disk 1, Disk 1 becomes /dev/dm-0 and Disk 2 becomes /dev/sdc (instead of /dev/sda as when I installed it). (I don't think I can switch this order because I'm worried that Windows will become confused.) So, how do I keep all partitions the same and get them all to work from grub? On which MBR will I need to install grub? How do I configure it to see all 3-4 of my operating systems? Do I fix grub from the Fedora LiveCD?
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Jul 11, 2010
I'm trying to install Fedora 13 on my HP dv6 laptop and when I try to use the Use Free Space installation type, I receive a Partitioning Error: Could not allocate requested partitions - not enough free space on disks. Before I started the install, I used the Disk Management utility in Windows 7 to shrink the volume of the C: drive down to 242 GB and leaving 210 GB Unallocated. Here is what the screen looks like when I select Create Custom Layout (also receive the not enough free space error):
Device (sda) Size Type
sda1 199 ntfs
sda2 248,018 ntfs
Free 215,175
sda3 13,443 ntfs
sda4 103 vfat
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Apr 8, 2010
I have Dell Laptop 1545 which already installed windows 7 home premium which is also having two partitions one is reserved by the oem and another is for recovery partition and another 200gb i am using for windows 7 now i have left only 80gb hard disk. So I started to install the Fedora 12 in my laptop every thing is going fine but
at the time of creating the partitions iam unable to allocate the partitions the left 80gb i tried to select and tried for custom partition but to my surprise it is giving the following message "Could not allocate requested partitions: not enough free space on disks"
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May 31, 2011
I upgraded F14 to F15; However, F15 no longer recognizes my 3 sata disks connected through Marvell controller. The controller is an integrated Marvell chipset 88SE6480. The controller has its own manufacturer driver but it was intended for RHEL 5.4 (mv64xx) and installation of this driver fails to generate mv64xx driver.
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Feb 25, 2010
I have servers which contain SATA disks and SAS disks. I was testing the speed of writing on these servers and I recognized that SAS 10.000 disks much more slowly than the SATA 7200. What do you think about this slowness? What are the reasons of this slowness?
I am giving the below rates (values) which I took from my test (from my comparisons between SAS 10.000 and SATA 7200);
dd if=/dev/zero of=bigfile.txt bs=1024 count=1000000 when this comment was run in SAS disk server, I took this output(10.000 rpm)
(a new server,2 CPU 8 core and 8 gb ram)
1000000+0 records in
1000000+0 records out
1024000000 bytes (1.0 GB) copied, 12.9662 s, 79.0 MB/s (I have not used this server yet) (hw raid1)
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Jan 10, 2011
I am trying to install Fedora 14 from CD and the installer looks for usable disks and at the end says "No usable disks have been found".
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